UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Steps to reproduce the problem:
  jQuery(document).bind('pointermove', function(ev) { console.log(ev.clientX); });

in the console of a Drupal 7 site. (Use simplytest.me to create a 7.51 site easily)

What is the expected behavior?
Logging the clientX property of the original event

What went wrong?
Undefined property only on Windows 10, chrome stable

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 54  Channel: stable
OS Version: 10
Flash Version: 

Hello there,

This is Fabian from Drupal, where we recently enabled pointer events via a jQuery binding.

We received bug reports (probably those 1% that have it enabled in stable) of drag and drop being broken in our latest stable release, but only on Chrome.

The strange thing is:

   It works in Firefox with the option enabled (and apparently IE 10).

The code to reproduce is:

  jQuery(document).bind('pointermove', function(ev) { console.log(ev.clientX); });

which fails with undefined property.

While obviously:

  jQuery(document).bind('pointermove', function(ev) { console.log(ev.originalEvent.clientX); });

works.

However jQuery (pretty old version though) correctly copies the event.clientX property in Firefox, but fails in Chrome. Maybe it cannot detect the mouse event inheritance somehow?

Not sure this is really a bug though, so just reporting the finding here.

Thanks,

Fabian